deltoids

Question 1

What are the parts of the deltoid M.?

Answer 1

anterior
middle
posterior

Question 2

What is the origin and insertion of the anterior deltoid?

Answer 2

origin - lateral clavicle

insertion deltoid tuberosity

Question 3

What is the action of the anterior deltoid?

Answer 3

major flexor of arm

medial rotator of the arm

Question 4

What is the origin anne insertion of middle deltoid?

Answer 4

acromion to deltoid tuberosity

Question 5

What is the action of the middle deltoid?

Answer 5

major abductor

does not abduct until arm is 15 -30 degrees away from the body

Question 6

What abducts the arm 0 to 15 degrees?

Answer 6

supraspinatus

Question 7

What takes over abduction when the arm reaches 15-30 degrees?

Answer 7

middle deltoid

Question 8

What is the origin and insertion of the posterior deltoid?

Answer 8

lateral scapula spine to deltoid tuberosity

Question 9

What is the action of the posterior deltoid?

Answer 9

weak extensor of the arm

slight lateral rotator

Question 10

What is the deltoid innervated by?

Answer 10

Axillary nerve

Question 11

What is the deltoids used for to test by clinicians?

Answer 11

the integrity of C5 nerve root

postaxillary nerve can be affected by upper brachial plexus injuries or fracture to surgical neck.